Neither the searing pain in my toe nor the blinding rain in my face will keep me from finishing the race. Is this a correct parallel sentence?....

Yes, correct.

Yes, the sentence "Neither the searing pain in my toe nor the blinding rain in my face will keep me from finishing the race" is a correct parallel sentence. It demonstrates parallelism by using the same sentence structure and coordinating conjunction ("nor") to link two elements (searing pain and blinding rain) that are being contrasted as obstacles. This helps to create balance and clarity in the sentence.